18 is quite close to 10, in an absolute sense. The context of that citation is a claim that it's statistically inaccurate to say police officers risk their lives. That claim is demonstrably
not borne out by statistics. Out of the universe of available professional work, being a police officer is #18 in risk. It's a rather small consolation that they're not eight jobs higher up the chain in terms of risk, considering there is essentially no chance of e.g. my monitor killing me as I sit at my desk.
A valid takeaway from the cited list is that being a police officer isn't literally the most dangerous thing you can do for work. An invalid takeaway is that being a police officer isn't dangerous.